Raspbian Jessie Configuration for Seeed TFT28B

Raspbian Jessie configuration for Seeed TFT28B

1) Burning images

Use Win32DiskImager or any other software to download the burning images and install them into a new SD Card.

2) Enable SPI interface

Turn on the Raspberry and login in.

Run sudo raspi-config and entry configuration interface, then Expand Filesystem and entry Advanced Options to Enable the SPI interface.

3) Upload the TFT-Drivers file to the /home/pi list by WinSCP or other tools.

4) Uncompress the Driver files to /home/pi.

5) Reboot.

6) You can look over the support list of the Drivers when execute the following command.

7) Edit the file sudo vim.tiny /etc/modules-load.d/fbtft.conf

8) Copy & paste the following line in:

bcm2708-rng

spi-bcm2708

spi-bcm2835

fbtft-device

Then save and quit.

9) Edit the file sudo vim.tiny /etc/modprobe.d/fbtft.conf, new version is seeed-tft28b.

options fbtft_device name=seeed-tft28b

10) You can add rotate parameter and change the bus frequency for SPI interface, performance experience, default is 32MHz.then run the follow command sudo sync; sudo reboot, it will help your raspberry pi to reboot.

options fbtft_device name=seeed-tft28b speed=48000000 rotate=270

11) Add ads7846 and ads7846-device to /etc/modules-load.d/fbtft.conf, it will add touch function for raspberry pi.

12) modify /etc/modprobe.d/fbtft.conf,add a line of code：options ads7846_device swap_xy=1 cs=1 speed=2000000 model=7846 x_min=230 x_max=3900 y_min=200 y_max=3700 x_plate_ohms=80 pressure_max=255 gpio_pendown=22 keep_vref_on=1

13) install the packages with:

sudo apt-get install libx11-dev libxext-dev libxi-dev x11proto-input-dev evtest

Next wget http://github.com/downloads/tias/xinput_calibrator/xinput_calibrator-0.7.5.tar.gz and uncompress tar xvf xinput_calibrator-0.7.5.tar.gz

Entry the xinput_calibrator-0.7.5 folder and enter ./configure

Enter sudo make

Enter sudo make install

Enter sudo reboot

14) Enter DISPLAY=:0.0 xinput_calibrator to calibrate the scree

Edit /etc/X11/xorg.conf.d/99-calibration.conf and copy it.

If /etc/X11/xorg.conf.d/ does not exist hence it needs to be created with the following command:
sudo mkdir /etc/X11/xorg.conf.d/

After that, we can edit the file as below:
sudo nano /etc/X11/xorg.conf.d/99-calibration.conf

You have finished the display configuration.